Home / 20,478.25-28,262.70-11,527.49

Finding the Fourth Proportional to 20,478.25, 28,262.70 and 11,527.49

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Solution

The fourth proportional to 20,478.25, 28,262.70 and 11,527.49 is: 15,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.25 : 28,262.70 = 11,527.49 : x
  2. Step 2: Convert to fraction form
    20,478.25/28,262.70 = 11,527.49/x
  3. Step 3: Cross multiply
    20,478.25x = 28,262.70 × 11,527.49
  4. Step 4: Simplify right side
    20,478.25x = 325,797,991.62
  5. Step 5: Solve for x
    x = 325,797,991.62/20,478.25
  6. Step 6: Final answer
    x = 15,909.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.